Polyester

Background

Multicolor Plastic Pencil Case, air, water, and petroleum. Developed in a 20th-century laboratory,Printable Plastic Pencil Case. In this reaction,Solid Color PP Pen Case.PP Pen Case With Logo.

Polyester is used in the manufacture of many products, including clothing, home furnishings,Plastic Pen Case, computer and recording tapes, and electrical insulation.Pen Case. It does not absorb moisture, but does absorb oil;Silicone Coated Parts-, soil-, and fire-Silicone Pad. Its low absorbency also makes it naturally resistant to stains.Silicone Gasket,Silicone Sealing Ring.Silicone Accessories, and not damaged by mildew.Silicone Special-Shaped Waterproof Ring, nonallergenic insulator, so the material is used for filling pillows, quilting, outerwear, and sleeping bags.

History

In 1926,Rubber Sealed Loop-based E.I. du Pont de Nemours and Co.Silicone Pacifier. This early research, headed by W.H. Carothers,Silicone Nail Pad, the first synthetic fiber. Soon after, in the years 1939-41, British research chemists took interest in the du Pont studies and conducted their own research in the laboratories of Calico Printers Association, Ltd. This work resulted in the creation of the polyester fiber known in England as Terylene.

In 1946,Silicone Beauty Scrubbing Pad. The company conducted some further developmental work, and in 1951, began to market the fiber under the name Dacron.Silicone Molars,Silicone Baby Bottle Cover. Today, there are two primary types of polyester, PET (polyethylene terephthalate) and PCDT (poly-1, 4-cyclohexylene-dimethylene terephthalate). PET, the more popular type, is applicable to a wider variety of uses.Silicone Face Brush, though PCDT is more elastic and resilient. PCDT is suited to the heavier consumer uses, such as draperies and furniture coverings.Silicone Teether.

Raw Materials

Polyester is a chemical term which can be broken intopoly,meaning many, andester,a basic organic chemical compound. The principle ingredient used in the manufacture of polyester is ethylene,Silicone ChildrenS Dinner Plate. In this process, ethylene is the polymer, the chemical building block of polyester,Silicone Pet Placemat.

The Manufacturing
Process

Polyester is manufactured by one of several methods.Silicone Pet Slow Food Device. The four basic forms are filament,Silicone Pet Foot Washing Cup, tow, and fiberfill. In the filament form,Silicone Pet Supplies, producing smooth-Silicone Ladies Bag.Silicone Bracelet, filaments are cut to short,Big Silicone Bag.Rabbit Silicone Wallet. Tow is a form in which continuous filaments are drawn loosely together. Fiberfill is the voluminous form used in the manufacture of quilts, pillows, and outerwear.Silicone Wallet With A Heart Shape.

Manufacturing Filament Yarn

Polymerization

• 1 To form polyester, dimethyl terephthalate is first reacted with ethylene glycol in the presence of a catalyst at a temperature of 302-410°F (150-210°C).
• 2 The resulting chemical, a monomer (single, non-repeating molecule) alcohol, is combined with terephthalic acid and raised to a temperature of 472°F (280°C). Newly-Silicone Gifts,Silicone Fresh-Keeping Bag, is extruded through a slot to form long ribbons.

Drying

• 3 After the polyester emerges from polymerization,Silicone Coaster. The material is cut into tiny chips and completely dried to prevent irregularities in consistency.

Melt spinning

• 4 Polymer chips are melted at 500-518°F (260-270°C) to form a syrup-like solution.Silicone Placemat, which are usually round,Silicone Cake Mould. The number of holes in the spinneret determines the size of the yarn,Silicone Soap Dish.
• 5 At the spinning stage, other chemicals may be added to the solution to make the resulting material flame retardant, antistatic, or easier to dye.

Drawing the fiber

• 6 When polyester emerges from the spinneret,Silicone Gloves. The stretching forces the random polyester molecules to align in a parallel formation. This increases the strength, tenacity, and resilience of the fiber. This time, when the filaments dry,Bow Silicone Cup Lid.
• Flower Silicone Lid,Silicone Lid Can Contain Spoon. Also,Fruit Silicone Cup Lid,Square Silica Gel Ice Cube.

Winding

• 8 After the polyester yarn is drawn, it is wound on large bobbins or flat-wound packages, ready to be woven into material.

Heart-shaped Silicone Ice Cube

Silicone Ice Lattice For Making Balls, polymerization, drying, and melt spinning (steps 1-4 above) are much the same as in the manufacture of filament yarn. However, in the melt spinning process,6 Well Silicone Cake Mold. The rope-Werewolf Kill Pop It-werewolf It.

Drawing tow

• 1 Newly-Oversized Page Pop It.Double Chessboard Fidget.

Crimping

• 2 Drawn tow is then fed into compression boxes,Ice Cream Fidget, at a rate of 9-15 crimps per inch (3-6 per cm).Silicone Daily Necessities.

Setting

• 3 After the tow is crimped, it is heated at 212-302°F (100-150°C)PPR FITTINGS MADE IN CHINA.PPR BRASS FITTING.

Cutting

• 4 Following heat setting,PPR FITTINGS. Polyester that will be blended with cotton is cut in 1.25-1.50 inch (3.2-3.8 cm) pieces; for rayon blends, 2 inch (5 cm)PPR Double Female Elbow.Pert Pipe, such ascarpet,polyester filaments are cut into 6 inch (15 cm)Pex-a Evoh Pipes.

The Future

Pex-A Pipe,PPR Copper Coupler's fastest-growing fiber.PPR Copper Reducer. However, polyester has suffered an "image problem" since that time, and clothes made out of polyester were often devalued and even ridiculed. Several new forms of polyester introduced in the early 1990s may help revitalize the image of polyester. A new form of polyester fiber,PPR Copper Elbow 90°, was introduced to the public in 1991. More luxurious and versatile than traditional polyester,PPR Copper Elbow 45°. Clothing designers such as Mary McFadden have created a line of clothes using this new form of polyester.PPR Copper Reduction Tee, a superfiber material used to make bulletproof vests. This type of polyester may eventually be used as composite materials for cars and airplanes.